Superconducting accelerating cavity production method

Abstract

A superconducting accelerating cavity production method with which a high-quality superconducting accelerating cavity can be produced with a compact device configuration and at low cost. The method of producing a superconducting accelerating cavity ( 1 ) includes arranging, in an axial direction (L), a plurality of half-cells ( 5 ) having openings at both ends in the axial direction and joining the openings to one another by welding. The half-cells ( 5 ) are joined by welding with a laser beam from the inside of the superconducting accelerating cavity ( 1 ) in which a vacuum atmosphere is created.

The invention claimed is: 
     
       1. A superconducting accelerating cavity production method comprising:
 producing a superconducting accelerating cavity by arranging, in an axial direction, a plurality of ring-like members having openings at both ends; 
 a non-penetration welding step of joining the openings to one another by non-penetration welding from outside of the superconducting accelerating cavity; 
 a vacuuming step of creating a vacuum atmosphere by evacuating an inner space inside the superconducting accelerating cavity after the non-penetration welding step; and 
 a laser welding step of joining the openings to one another by welding with a laser beam from the inside of the superconducting accelerating cavity, in which a vacuum atmosphere is created. 
 
     
     
       2. The superconducting accelerating cavity production method according to  claim 1 , wherein a suction operation is performed during the laser welding step, wherein the suction operation is performed by a vacuum pump.